1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright 2018, Breno Leitao, Gustavo Romero, IBM Corp.
4 *
5 * A test case that creates a signal and starts a suspended transaction
6 * inside the signal handler.
7 *
8 * It returns from the signal handler with the CPU at suspended state, but
9 * without setting usercontext MSR Transaction State (TS) fields.
10 */
11
12 #define _GNU_SOURCE
13 #include <stdio.h>
14 #include <stdlib.h>
15 #include <signal.h>
16
17 #include "utils.h"
18 #include "tm.h"
19
trap_signal_handler(int signo,siginfo_t * si,void * uc)20 void trap_signal_handler(int signo, siginfo_t *si, void *uc)
21 {
22 ucontext_t *ucp = (ucontext_t *) uc;
23
24 asm("tbegin.; tsuspend.;");
25
26 /* Skip 'trap' instruction if it succeed */
27 ucp->uc_mcontext.regs->nip += 4;
28 }
29
tm_signal_sigreturn_nt(void)30 int tm_signal_sigreturn_nt(void)
31 {
32 struct sigaction trap_sa;
33
34 SKIP_IF(!have_htm());
35 SKIP_IF(htm_is_synthetic());
36
37 trap_sa.sa_flags = SA_SIGINFO;
38 trap_sa.sa_sigaction = trap_signal_handler;
39
40 sigaction(SIGTRAP, &trap_sa, NULL);
41
42 raise(SIGTRAP);
43
44 return EXIT_SUCCESS;
45 }
46
main(int argc,char ** argv)47 int main(int argc, char **argv)
48 {
49 test_harness(tm_signal_sigreturn_nt, "tm_signal_sigreturn_nt");
50 }
51
52
